package thread;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class SyncApiDemo2 {
    public static void main(String[] args) {
        //  List<Integer> list = new ArrayList<>();
        List<Integer> list =Collections.synchronizedList( new ArrayList<>());
        Thread t1 =new Thread(()->{
            for (int i = 0; i < 1000; i++) {
                list.add(i);
            }
        });
        Thread t2 =new Thread(()->{
            for (int i = 0; i < 1000; i++) {
                list.add(i);
            }
        });
        t1.start();
        t2.start();
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        System.out.println(list.size());
    }
}
